Guides
Making sense of deck and patio bookkeeping
Deck and patio bookkeeping ties each build stage to a cost line, so a spring rush or a permit delay shows up in the numbers before it hits cash.
What to take away
- Map every cost line to a stage in the buildlead, site visit, measurement, design handoff, estimate, contract, permit, procurement, mobilization, demolition, foundation, framing, decking, railing, inspection, punch.
- Track framing tools and consumables as their own line, because repair bills land in the same month as a permit delay.
- Reconcile weekly for labour hours, monthly for job cost against the quote, and again at job close, matching quotes, change orders and invoices.
- Give one person authority to flag exceptions, and review the flagged items on a fixed schedule.
- Confirm recordkeeping requirements with your accountant and the CRA, and permit scope with your municipal office.
This article covers general deck and patio contracting practice. It does not cover structural, engineering, permit, tax, insurance or legal advice. Requirements vary by province, municipality, site and design. Confirm them with your local authority having jurisdiction and a qualified professional.
Why a benchmark will not balance your books
A national average tells you what other contractors spent. It does not tell you what your spring build season costs when two crews are framing at once.
Your model has to fit your service mix, your crew structure and your tolerance for a slow month. Build it from your own estimates, invoices and change orders, then test it against last season's records.
The cost lines, and where each one bites
| Cost line | How it behaves in a deck and patio shop | What to watch |
|---|---|---|
| Fixed overhead | Sets the floor every month must clear | Renewals that creep up quietly |
| Materials and consumables per build | Easiest line to price into the estimate | Supplier increases absorbed instead of passed on |
| Labour | Flexes less than it looks | Overtime through spring build season |
| Framing and installation tools | Lumpy: quiet for months, then a large repair bill | Breakdowns in a week already strained by a permit delay |
| Permit and inspection fees | Predictable per job, unpredictable in timing | Re-inspection charges after a failed rough-in |
A permit delay in the busiest month does not just push the schedule. It holds mobilization costs while the crew waits, and it can push a foundation pour into a week the excavator is already booked.
Worked example. Four carpenters work 10 hours of overtime a week for six weeks in the spring rush. That is 240 overtime hours. At a 55 dollar base rate the premium half is 27.50 an hour, so 6,600 dollars lands in labour on a 24,000 dollar deck.
Then the cash side. The overtime alone is 27 percent of that contract price. A two week permit hold in the same month leaves three crew members idle for three days at 55 dollars an hour, or 3,960 dollars. The 8,000 dollar framing payment slips a month, but the 6,400 dollar material invoice still comes due.
Figures are illustrative; your crew size and rates set the real numbers.
Number these lines so estimates, job reports and tax returns share labels:
Line / What goes in it
- 4000 Revenue
- Signed contract, change orders
- 5000 Materials
- Decking, railing, concrete
- 5100 Consumables
- Blades, flashing, sealant
- 5200 Labour
- Regular hours by trade
- 5250 Overtime
- Hours above the standard week
- 5300 Subcontractors
- Excavation, electrical, repairs
- 5500 Permits and fees
- Permit, inspection, re-inspection
- 6000 Fixed overhead
- Insurance, software, yard, truck
Where the workflow leaks money
Walk the sequence and name the stage where cash leaves before revenue arrives.
Where the workflow leaks money
- Lead and site visitunpaid drive time
- Measurement and design handoffre-measure
- Estimate and contractunderpriced job
- Permit and procurementearly material order
- Mobilization through demolitiondouble equipment moves
- Foundation, framing, decking, railingcall-backs
- Inspection and punchfailed inspection
- Lead and site visit. Unpaid drive time is a real cost, so record it per lead and compare it against your close rate.
- Measurement and design handoff. A re-measure because the first numbers were wrong is a second site visit you did not price.
- Estimate and contract. An underpriced job shows up here first, months before the shortfall lands.
- Permit and procurement. Material ordered before the permit clears sits in the yard, tying up cash.
- Mobilization through demolition. Equipment moved twice costs the same as moving it once, plus the lost hours.
- Foundation, framing, decking, railing. This is where a fastener or flashing call-back starts, and call-backs are unpaid return trips.
- Inspection and punch. A failed inspection means a second visit, a second fee and a delayed final payment.
A written deck and patio service standards document keeps crews from handling the same stage differently, which is what makes the numbers comparable month to month.
What to check before you trust a report
Take the job cost report for one build. State the formula, the source, the exclusions, the timing and the owner, then reconcile the period against your own records before you act on it.
If permit fees and call-backs sit in overhead, a slow job can still look profitable.
Vendor labels are the usual trap. Two systems can both call a figure "gross margin" and mean different things, so check the definition before you compare months.
Name one person who owns reporting and the records that prove the definitions were applied. If results weaken, check demand, capacity, training and pricing before you change the standard.
Records and the tools that hold them
Internal Revenue Service: What kind of records should I keep? sets out the general principle: keep a system that clearly shows income and expenses, with documents supporting purchases, sales, payroll and assets. Canadian requirements differ, so confirm your own with an accountant and the CRA.
National Institute of Standards and Technology: NIST Small Business Quick-Start Guides gives small organizations a practical starting point for protecting the systems those records live in, including the Cybersecurity Framework 2.0.
Cybersecurity and Infrastructure Security Agency: Cyber Guidance for Small Businesses covers the same ground for small and midsize firms, with current guidance aimed at common digital and operational risks.
Good records also feed the deck and patio business plan when you set targets for the coming season.
Test the system before you rely on it
Run a sandbox pass:
Sandbox test scenarios
- New lead
- Change order
- Cancellation
- Crew absence
- Material delay
- Partial completion
- Refund
- Failed payment
Run every scenario before you trust the numbers:
- Book one job from quote to final invoice.
- Enter a change order after signing and follow it to the invoice.
- Post a material order placed before the permit clears.
- Add Friday overtime and check the pay period and the job.
- Reverse a duplicate supplier invoice and check job cost.
- Post a re-inspection fee to the job, not to overhead.
- Record a call-back with no invoice attached.
- Close a job and check work in progress is empty.
- Compare the closed job to the original estimate.
- Run month end with someone else entering the transactions.
Then run the same scenarios in an ordinary week and in a spring rush. A scenario that only passes because someone worked around the system is the finding, not the score.
Common questions
What is the first cost line to fix?
Labour, because it flexes least and overtime in spring is where the margin goes. Track regular hours, overtime and piece or sub payments as separate lines so you can see which one moved.
Should I copy another contractor's chart of accounts?
No. Start from the sample list of cost lines above and set your own figures from your own invoices.
How often should I reconcile the books against job records?
Weekly for labour hours, monthly for job cost against the quote, and again at the close of each job, matching the signed quote, change orders, supplier and subcontractor invoices, timesheets and permit fee receipts. A job that reconciles only at year end hides the underpriced estimate until the cash is already spent.
Where do call-backs show up?
As unpaid return trips, usually under labour and consumables. Log each one against the job and the stage so you can see whether flashing, ledger detail or railing work is generating them.
